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Citation: Cao Gang-Min, Yang Fang-Zu, Huang Ling, Niu Zhen-Jiang, Xu Shu-Kai, Zhou Shao-Min. Structure and Property of Ni-W-B Alloy Electrodeposits Before and After Heat Treatment[J]. Acta Physico-Chimica Sinica, ;2001, 17(02): 150-154. doi: 10.3866/PKU.WHXB20010212 shu

Structure and Property of Ni-W-B Alloy Electrodeposits Before and After Heat Treatment

1.
Chemistry Department, State Key Laboratory for Physical Chemistry of Solid Surfaces, Institute of Physical Chemistry, Xiamen University,Xiamen　361005

Received Date: 8 May 2000
Available Online: 15 February 2001

The structure and microhardness of NiWB alloy were studied by means of electrochemical techniques, XPS, DSC and XRD before and after heat treatment. The results showed that the process of NiWB alloy electrodeposition was accompanied by the chemical deposition of Ni and adulteration of Na2B4O7 in the deposit. NiW alloy presented in nanocrystalline structure and NiWB in amorphous structure were both coarsened in grain size and led to the evolution of Ni4W, and precipitation of Ni－B compound such as Ni2B, Ni3B in NiWB alloy after heat treatment. The maximum microhardness could be observed for NiW alloy at the value of 919.8 kg•mm－2 after heat treatment for 2 hours at temperature of 400 ℃ and NiWB alloy at 1132.2 kg•mm－2 (500 ℃, 2 hrs).
- Ni-W-B alloy;Electrodeposition;Structure;Microhardness;Heat treatment
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